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Annotation of mandoc/tbl_data.c, Revision 1.55

1.55    ! schwarze    1: /*     $Id: tbl_data.c,v 1.54 2021/05/15 17:19:04 schwarze Exp $ */
1.1       kristaps    2: /*
1.20      schwarze    3:  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.55    ! schwarze    4:  * Copyright (c) 2011,2015,2017-2019,2021 Ingo Schwarze <schwarze@openbsd.org>
1.1       kristaps    5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
1.11      kristaps   18: #include "config.h"
1.32      schwarze   19:
                     20: #include <sys/types.h>
1.11      kristaps   21:
1.1       kristaps   22: #include <assert.h>
                     23: #include <ctype.h>
1.53      schwarze   24: #include <stdint.h>
1.50      schwarze   25: #include <stdio.h>
1.1       kristaps   26: #include <stdlib.h>
                     27: #include <string.h>
1.6       kristaps   28: #include <time.h>
1.1       kristaps   29:
1.48      schwarze   30: #include "mandoc_aux.h"
1.1       kristaps   31: #include "mandoc.h"
1.48      schwarze   32: #include "tbl.h"
1.1       kristaps   33: #include "libmandoc.h"
1.49      schwarze   34: #include "tbl_int.h"
1.1       kristaps   35:
1.33      schwarze   36: static void             getdata(struct tbl_node *, struct tbl_span *,
1.22      kristaps   37:                                int, const char *, int *);
1.30      schwarze   38: static struct tbl_span *newspan(struct tbl_node *, int,
1.22      kristaps   39:                                struct tbl_row *);
1.1       kristaps   40:
1.30      schwarze   41:
1.33      schwarze   42: static void
1.30      schwarze   43: getdata(struct tbl_node *tbl, struct tbl_span *dp,
1.1       kristaps   44:                int ln, const char *p, int *pos)
                     45: {
1.46      schwarze   46:        struct tbl_dat  *dat, *pdat;
1.3       kristaps   47:        struct tbl_cell *cp;
1.46      schwarze   48:        struct tbl_span *pdp;
1.55    ! schwarze   49:        const char      *ccp;
1.37      schwarze   50:        int              sv;
1.1       kristaps   51:
1.47      schwarze   52:        /*
                     53:         * Determine the length of the string in the cell
                     54:         * and advance the parse point to the end of the cell.
                     55:         */
                     56:
                     57:        sv = *pos;
1.55    ! schwarze   58:        ccp = p + sv;
        !            59:        while (*ccp != '\0' && *ccp != tbl->opts.tab)
        !            60:                if (*ccp++ == '\\')
        !            61:                        mandoc_escape(&ccp, NULL, NULL);
        !            62:        *pos = ccp - p;
1.47      schwarze   63:
1.38      schwarze   64:        /* Advance to the next layout cell, skipping spanners. */
                     65:
1.37      schwarze   66:        cp = dp->last == NULL ? dp->layout->first : dp->last->layout->next;
                     67:        while (cp != NULL && cp->pos == TBL_CELL_SPAN)
1.3       kristaps   68:                cp = cp->next;
                     69:
1.16      kristaps   70:        /*
1.43      schwarze   71:         * If the current layout row is out of cells, allocate
                     72:         * a new cell if another row of the table has at least
                     73:         * this number of columns, or discard the input if we
                     74:         * are beyond the last column of the table as a whole.
1.16      kristaps   75:         */
                     76:
1.37      schwarze   77:        if (cp == NULL) {
1.43      schwarze   78:                if (dp->layout->last->col + 1 < dp->opts->cols) {
                     79:                        cp = mandoc_calloc(1, sizeof(*cp));
                     80:                        cp->pos = TBL_CELL_LEFT;
1.53      schwarze   81:                        cp->spacing = SIZE_MAX;
1.43      schwarze   82:                        dp->layout->last->next = cp;
                     83:                        cp->col = dp->layout->last->col + 1;
                     84:                        dp->layout->last = cp;
                     85:                } else {
1.51      schwarze   86:                        mandoc_msg(MANDOCERR_TBLDATA_EXTRA,
                     87:                            ln, sv, "%s", p + sv);
1.47      schwarze   88:                        while (p[*pos] != '\0')
1.43      schwarze   89:                                (*pos)++;
                     90:                        return;
                     91:                }
1.16      kristaps   92:        }
                     93:
1.46      schwarze   94:        dat = mandoc_malloc(sizeof(*dat));
1.3       kristaps   95:        dat->layout = cp;
1.46      schwarze   96:        dat->next = NULL;
                     97:        dat->string = NULL;
                     98:        dat->hspans = 0;
                     99:        dat->vspans = 0;
                    100:        dat->block = 0;
1.11      kristaps  101:        dat->pos = TBL_DATA_NONE;
1.46      schwarze  102:
                    103:        /*
                    104:         * Increment the number of vertical spans in a data cell above,
                    105:         * if this cell vertically extends one or more cells above.
                    106:         * The iteration must be done over data rows,
                    107:         * not over layout rows, because one layout row
                    108:         * can be reused for more than one data row.
                    109:         */
                    110:
1.47      schwarze  111:        if (cp->pos == TBL_CELL_DOWN ||
                    112:            (*pos - sv == 2 && p[sv] == '\\' && p[sv + 1] == '^')) {
1.46      schwarze  113:                pdp = dp;
                    114:                while ((pdp = pdp->prev) != NULL) {
                    115:                        pdat = pdp->first;
                    116:                        while (pdat != NULL &&
                    117:                            pdat->layout->col < dat->layout->col)
                    118:                                pdat = pdat->next;
                    119:                        if (pdat == NULL)
                    120:                                break;
1.47      schwarze  121:                        if (pdat->layout->pos != TBL_CELL_DOWN &&
                    122:                            strcmp(pdat->string, "\\^") != 0) {
1.46      schwarze  123:                                pdat->vspans++;
                    124:                                break;
                    125:                        }
                    126:                }
                    127:        }
                    128:
                    129:        /*
                    130:         * Count the number of horizontal spans to the right of this cell.
                    131:         * This is purely a matter of the layout, independent of the data.
                    132:         */
                    133:
1.37      schwarze  134:        for (cp = cp->next; cp != NULL; cp = cp->next)
                    135:                if (cp->pos == TBL_CELL_SPAN)
1.46      schwarze  136:                        dat->hspans++;
1.16      kristaps  137:                else
                    138:                        break;
1.46      schwarze  139:
                    140:        /* Append the new data cell to the data row. */
1.30      schwarze  141:
1.37      schwarze  142:        if (dp->last == NULL)
                    143:                dp->first = dat;
                    144:        else
1.1       kristaps  145:                dp->last->next = dat;
1.37      schwarze  146:        dp->last = dat;
1.1       kristaps  147:
1.11      kristaps  148:        /*
                    149:         * Check for a continued-data scope opening.  This consists of a
                    150:         * trailing `T{' at the end of the line.  Subsequent lines,
                    151:         * until a standalone `T}', are included in our cell.
                    152:         */
                    153:
1.37      schwarze  154:        if (*pos - sv == 2 && p[sv] == 'T' && p[sv + 1] == '{') {
1.11      kristaps  155:                tbl->part = TBL_PART_CDATA;
1.33      schwarze  156:                return;
1.11      kristaps  157:        }
                    158:
1.37      schwarze  159:        dat->string = mandoc_strndup(p + sv, *pos - sv);
1.1       kristaps  160:
1.47      schwarze  161:        if (p[*pos] != '\0')
1.1       kristaps  162:                (*pos)++;
                    163:
                    164:        if ( ! strcmp(dat->string, "_"))
1.5       kristaps  165:                dat->pos = TBL_DATA_HORIZ;
1.1       kristaps  166:        else if ( ! strcmp(dat->string, "="))
1.5       kristaps  167:                dat->pos = TBL_DATA_DHORIZ;
1.1       kristaps  168:        else if ( ! strcmp(dat->string, "\\_"))
1.5       kristaps  169:                dat->pos = TBL_DATA_NHORIZ;
1.1       kristaps  170:        else if ( ! strcmp(dat->string, "\\="))
1.5       kristaps  171:                dat->pos = TBL_DATA_NDHORIZ;
                    172:        else
                    173:                dat->pos = TBL_DATA_DATA;
1.11      kristaps  174:
1.37      schwarze  175:        if ((dat->layout->pos == TBL_CELL_HORIZ ||
                    176:            dat->layout->pos == TBL_CELL_DHORIZ ||
                    177:            dat->layout->pos == TBL_CELL_DOWN) &&
                    178:            dat->pos == TBL_DATA_DATA && *dat->string != '\0')
                    179:                mandoc_msg(MANDOCERR_TBLDATA_SPAN,
1.51      schwarze  180:                    ln, sv, "%s", dat->string);
1.11      kristaps  181: }
                    182:
1.45      schwarze  183: void
1.35      schwarze  184: tbl_cdata(struct tbl_node *tbl, int ln, const char *p, int pos)
1.11      kristaps  185: {
                    186:        struct tbl_dat  *dat;
1.30      schwarze  187:        size_t           sz;
1.11      kristaps  188:
                    189:        dat = tbl->last_span->last;
1.14      kristaps  190:
                    191:        if (p[pos] == 'T' && p[pos + 1] == '}') {
                    192:                pos += 2;
                    193:                if (p[pos] == tbl->opts.tab) {
                    194:                        tbl->part = TBL_PART_DATA;
                    195:                        pos++;
1.40      schwarze  196:                        while (p[pos] != '\0')
                    197:                                getdata(tbl, tbl->last_span, ln, p, &pos);
1.45      schwarze  198:                        return;
1.37      schwarze  199:                } else if (p[pos] == '\0') {
1.14      kristaps  200:                        tbl->part = TBL_PART_DATA;
1.45      schwarze  201:                        return;
1.14      kristaps  202:                }
                    203:
                    204:                /* Fallthrough: T} is part of a word. */
                    205:        }
1.17      kristaps  206:
                    207:        dat->pos = TBL_DATA_DATA;
1.42      schwarze  208:        dat->block = 1;
1.11      kristaps  209:
1.37      schwarze  210:        if (dat->string != NULL) {
1.36      schwarze  211:                sz = strlen(p + pos) + strlen(dat->string) + 2;
1.11      kristaps  212:                dat->string = mandoc_realloc(dat->string, sz);
1.31      schwarze  213:                (void)strlcat(dat->string, " ", sz);
1.36      schwarze  214:                (void)strlcat(dat->string, p + pos, sz);
1.11      kristaps  215:        } else
1.36      schwarze  216:                dat->string = mandoc_strdup(p + pos);
1.19      kristaps  217:
1.37      schwarze  218:        if (dat->layout->pos == TBL_CELL_DOWN)
1.51      schwarze  219:                mandoc_msg(MANDOCERR_TBLDATA_SPAN,
                    220:                    ln, pos, "%s", dat->string);
1.1       kristaps  221: }
                    222:
1.20      schwarze  223: static struct tbl_span *
1.22      kristaps  224: newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
1.20      schwarze  225: {
                    226:        struct tbl_span *dp;
                    227:
1.37      schwarze  228:        dp = mandoc_calloc(1, sizeof(*dp));
1.22      kristaps  229:        dp->line = line;
1.26      schwarze  230:        dp->opts = &tbl->opts;
1.20      schwarze  231:        dp->layout = rp;
1.34      schwarze  232:        dp->prev = tbl->last_span;
1.20      schwarze  233:
1.34      schwarze  234:        if (dp->prev == NULL) {
                    235:                tbl->first_span = dp;
1.21      schwarze  236:                tbl->current_span = NULL;
1.34      schwarze  237:        } else
                    238:                dp->prev->next = dp;
                    239:        tbl->last_span = dp;
1.20      schwarze  240:
1.41      schwarze  241:        return dp;
1.20      schwarze  242: }
                    243:
1.33      schwarze  244: void
1.35      schwarze  245: tbl_data(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1       kristaps  246: {
1.3       kristaps  247:        struct tbl_row  *rp;
1.43      schwarze  248:        struct tbl_cell *cp;
1.44      schwarze  249:        struct tbl_span *sp;
1.1       kristaps  250:
1.54      schwarze  251:        for (sp = tbl->last_span; sp != NULL; sp = sp->prev)
                    252:                if (sp->pos == TBL_SPAN_DATA)
                    253:                        break;
                    254:        rp = sp == NULL ? tbl->first_row :
                    255:            sp->layout->next == NULL ? sp->layout : sp->layout->next;
1.43      schwarze  256:        assert(rp != NULL);
1.3       kristaps  257:
1.52      schwarze  258:        if (p[1] == '\0') {
                    259:                switch (p[0]) {
                    260:                case '.':
                    261:                        /*
                    262:                         * Empty request lines must be handled here
                    263:                         * and cannot be discarded in roff_parseln()
                    264:                         * because in the layout section, they
                    265:                         * are significant and end the layout.
                    266:                         */
                    267:                        return;
                    268:                case '_':
                    269:                        sp = newspan(tbl, ln, rp);
                    270:                        sp->pos = TBL_SPAN_HORIZ;
                    271:                        return;
                    272:                case '=':
                    273:                        sp = newspan(tbl, ln, rp);
                    274:                        sp->pos = TBL_SPAN_DHORIZ;
                    275:                        return;
                    276:                default:
                    277:                        break;
                    278:                }
1.1       kristaps  279:        }
1.43      schwarze  280:
                    281:        /*
1.44      schwarze  282:         * If the layout row contains nothing but horizontal lines,
                    283:         * allocate an empty span for it and assign the current span
                    284:         * to the next layout row accepting data.
1.43      schwarze  285:         */
                    286:
1.44      schwarze  287:        while (rp->next != NULL) {
                    288:                if (rp->last->col + 1 < tbl->opts.cols)
                    289:                        break;
                    290:                for (cp = rp->first; cp != NULL; cp = cp->next)
                    291:                        if (cp->pos != TBL_CELL_HORIZ &&
                    292:                            cp->pos != TBL_CELL_DHORIZ)
                    293:                                break;
                    294:                if (cp != NULL)
                    295:                        break;
                    296:                sp = newspan(tbl, ln, rp);
                    297:                sp->pos = TBL_SPAN_DATA;
                    298:                rp = rp->next;
1.43      schwarze  299:        }
1.5       kristaps  300:
1.44      schwarze  301:        /* Process a real data row. */
1.1       kristaps  302:
1.44      schwarze  303:        sp = newspan(tbl, ln, rp);
                    304:        sp->pos = TBL_SPAN_DATA;
                    305:        while (p[pos] != '\0')
                    306:                getdata(tbl, sp, ln, p, &pos);
1.1       kristaps  307: }

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